need help partition on hard drive with os already on it

[brain-dead]

I am trying to install OpenBSD on a computer that already had Linux on it, plus a swap partition, and I need help creating a new partition for OpenBSD. I've gotten to the point where I create the new partition and it asks for an offset. first partition is linux ext4, next is the swap. It would be great if someone would help; I will supply any information necessary for the resolution of this problem.

[J65nko]

OpenBSD needs a primary partition with A6 as partition identifier.

j65nko@hercules[~]fdisk wd0

Disk: wd0       geometry: 38913/255/63 [625142448 Sectors]
Offset: 0       Signature: 0xAA55
            Starting         Ending         LBA Info:
 #: id      C   H   S -      C   H   S [       start:        size ]
-------------------------------------------------------------------------------
*0: A6      0   1   1 -   5098 254  63 [          63:    81915372 ] OpenBSD     
 1: A5   5099   0   1 -  22945 254  63 [    81915435:   286712055 ] FreeBSD     
 2: 82  22946   0   1 -  23011 254  63 [   368627490:     1060290 ] Linux swap  
 3: 83  23012   0   1 -  38912 254  63 [   369687780:   255449565 ] Linux files*

Usually it is easier to create such a partition with the tools you are familiar with. Just use Gparted or the Linux fdisk if you feel more comfortable with them.

What is the output of Linux fdisk -l ?

[jggimi]

To be clear, all of the OpenBSD partitions you will use will all be created inside this single A6 partition, a thru p. Except c, which represents the entire physical drive. This is done in another layer of partitions, separately from MBR partitioning.

[brain-dead]

Yes, thank you, J65nko. I was indeed aware of that, jggimi. thank you. I used pmagic, and stuff seems to work now, more or less. Just gotta configure the bootloader now. I can probably do that myself.
Buh-bye.